AutoSave C) Q [a {F} 8 D my Module 2 Lab 2 Measuring the Speed of Sound Saved to my Mac v Home Insert Draw Design Layout References Mailings Review View 9 Tell me a\" Arial v 18 v A\" A\" Aa v A 1: v: v >ii ii Q\" Q E v Heading 1 Heading 2 Styles Dictate Sensitivity Editor Pane I 1 Focus m + 100% AutoSave O A A . C G 90 0 ... w- Module 2 Lab 2 Measuring the Speed of Sound - Saved to my Mac v Home Insert Draw Design Layout References Mailings Review View ? Tell me Comments Editing Share Arial v 18 A" A Aa Ap EEVEEVEE AaBbCcDdEE AaBbCcDdEE AaBbC AaBbCc[ Paste BIUvab X X|A DAY Normal No Spacing Heading Heading 2 styles Dictate Sensitivity Editor Pane NOL PHY 202 1) Perform the experiment with three different frequencies: 2kHz, 3kHz, and 4kHz. 2) Collect three pictures of your three trials and add them to your spreadsheet report. In the picture, one should see the phone cable and the measuring device marking the distance between the two pen spots. 3) Calculate the speed of sound for each trial and report the data on a table like the sample below. 4) Determine the percent uncertainty on the speed for each trial. See Appendix 1. 5) Take the average of the obtained three values for the speed of sound and as its uncertainty use the larger uncertainty from the individual trials 6) Write the abstract. See Appendix 2. Measuring the speed of sound Lab f ( Hz) A (m ) % uncertainty on f % uncertainty on a speed of sound % uncertainty on the speed 2000 3000 4000 Average speed from 3 trials Uncertainty on the average Appendix 1. Propagation of error (Method of adding relative uncertainty) How do I include the uncertainty (error) on my speed values? Using propagation of error and calculus we can find the error on the speed for each trial. We can use a simple rule derived from calculus that says that the percent uncertainty in a quantity calculated by multiplication or division is the sum of the percent uncertainties in the items used to make the calculation. (OpenStax). In our measurements we use in the calculations the frequency and the wavelength, the equation will be 42 4f The quantities marked with the 41 or 4) are the uncertainties on the measurements of the wavelength and the frequency. For example, if you measure the wavelength to be 16.5 cm with your ruler the uncertainty could be 0.5 cm, giving a percent uncertainty of = 3%. For the uncertainty on the frequency, you can use 10 Hz, giving a percentage of -10 = 3000 = 0.3%. Page 2 of 4 974 words X English (United States) Focus E + 100%AutoSave O A A . C GOD ... w Module 2 Lab 2 Measuring the Speed of Sound - Saved to my Mac v Home Insert Draw Design Layout References Mailings Review View ? Tell me Comments Editing Share Arial v 18 A" A Aa Ap AaBbCcDdEE AaBbCcDdEE AaBbC AaBbCc[ Paste BIUvab X X |A DAY Normal No Spacing Heading Heading 2 styles Dictate Sensitivity Editor Pane NOL PHY 202 In this example, the speed would be v = Af = 0.165 * 3000 = 495 m/s with a 3.3% uncertainty, obtained by adding 3% plus 0.3%. Giving us a final answer as 495 + 16 m/s. Appendix 2. Writing the Abstract Using Microsoft Word (or other software), write the Abstract for this experiment. Tips for Writing a Title and Abstract: See below from the APS (American Physical Society - Tips for Writing a Title and Abstract). The highlighted parts are relevant for your report. "Don't let their small size fool you, titles and scientific abstracts pack a punch! Your title and abstract are a brief summary of a paper or presentation. Often, this is the first chance you have to make an impression on the audience, and the basis for whether they decide to attend your presentation or read your paper Before you start writing, think about the big picture. What is the relevance of your project? What is the context in which you will present your work? How does your project fit into the broader scope of the meeting or journal you are submitting to? Use the answers to these questions as the framework." Parts of an Abstract Good abstracts include many of the parts of a paper, condensed or simplified to the most essential information: . Introduction . The goal of the project How that goal was met Key results Grading rubric Section 1: The experiment (20 points) 5pt for accurate data collection . 3pt for clean table on the google spreadsheet . 3pt for correct error calculations 3pt for correct average and error on the average 3pt for neatly presenting the average speed and its uncertainty 3pt for adding the three pictures on the spreadsheet. Page 3 of 4 974 words X English (United States) Focus E + 100%AutoSave () Q [a F) B B my Module 2 Lab 2 Measuring the Speed of Sound Saved to my Mac v Home Insert Draw Design Layout References Mailings Review View 9 Tell me C] Comments an . A v :: ;: A L V Arlal v 18 v A A Aa v 1% __ v g_ v zl (i AaBchDdEE AaBchDdE AaBbCI AaBchI > 6% Q paste 6 B I U v ab x2 x7 A v p v A v v Normal Nu Spacing Heading 1 Heading 2 Styles Dictate _ Pane -. as. g n.-. ._ Section 1: The experiment (20 points) - 5pt for accurate data collection . apt for clean table on the google W o 3pt for correct error calculations 0 apt for correct average and error on the average - apt for neatly presenting the average speed and its m; - apt for adding the three pictures on the spreadsheet Page 3 of A NOL PHY 202 Section 2: The abstract (20 points, no more than one page) 0 apt for a neat presentation of the paper using the google tools on the work Q o apt for writing the introduction about the physics involved in the W . apt for describing the goal oi the project (What did you want to measure?) 0 4pt for describing how the goal was met (How did you perform the experiment?) 0 Apt for reporting the nal result about the sound's M o apt if the abstract is logical, well 9rg_a_niz_e_d_ and iniormative. Editor. Check for Spelling, Grammar, and Writing issues Page 3 of 4 974 words EIIX English (United States) : : Focus iii 5 Editing v @ E\" ' Sensitivity Editor _ + 100%